A tensile test specimen of 1045 hot-rolled steel having a diameter of 0.5 in. and a...

  

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A tensile test specimen of 1045 hot-rolled steel having a diameter of 0.5 in. and a gage length of 2.00 in. was tested to fracture. Stress and strain data obtained during the test are shown in the figure. Note that the upper and lower scales refer to two different sets of axis labels on the strain axis. Determine: (a) the modulus of elasticity. (b) the proportional limit. (c) the ultimate strength. (d) the yield strength (0.20% offset). (e) the fracture stress. (f) the true fracture stress if the final diameter of the specimen at the location of the fracture was 0.39 in. Stress (ksi) 120 100 80 8 40 20 Upper scale Lower scale 0.025 0.050 0.075 0.100 0.125 0.150 0.175 0.006 0.008 0.010 0.012 0.014 Strain (in/in.) 0 0.002 0.004 A tensile test specimen of 1045 hot-rolled steel having a diameter of 0.5 in. and a gage length of 2.00 in. was tested to fracture. Stress and strain data obtained during the test are shown in the figure. Note that the upper and lower scales refer to two different sets of axis labels on the strain axis. Determine: (a) the modulus of elasticity. (b) the proportional limit. (c) the ultimate strength. (d) the yield strength (0.20% offset). (e) the fracture stress. (f) the true fracture stress if the final diameter of the specimen at the location of the fracture was 0.39 in. Stress (ksi) 120 100 80 8 40 20 Upper scale Lower scale 0.025 0.050 0.075 0.100 0.125 0.150 0.175 0.006 0.008 0.010 0.012 0.014 Strain (in/in.) 0 0.002 0.004